<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .top {
            width: 100%;
            height: 80px;
            background: #ccc;
            margin: auto;
            text-align: center;
            line-height: 80px;
            border: 2px dashed rgb(107, 107, 107);
        }

        .banner {
            width: 100%;
            height: 60px;
            background: #ccc;
            margin: 5px auto;
            text-align: center;
            border: 2px dashed rgb(107, 107, 107);
            line-height: 60px;
        }

        .main {
            width: 100%;
            height: 500px;
            background: #ccc;
            border: 2px dashed rgb(107, 107, 107);
            margin: auto;
            text-align: center;
            line-height: 500px;
        }

        .footer {
            width: 100%;
            height: 120px;
            background: #ccc;
            margin: auto;
            border: 2px dashed rgb(107, 107, 107);
            text-align: center;
            line-height: 120px;
            margin-top: 5px;
        }
    </style>
</head>

<body>
    <div class="top">top</div>
    <div class="banner">banner</div>
    <div class="main">main</div>
    <div class="footer">footer</div>
</body>

</html>